In USA there is, to the best of my knowledge, no requirement for any training or endorsement for a CS prop. Pilots used to get that training working for a Commercial rating when a "complex" airplane was required.
My first CS prop experience was in a Arrow during commercial training but later I flew the C-182 that required a "high performance" endorsement. I require no endorsements to fly my tailwheel CS prop airplane. Anyone not "grandfathered" would only need a tailwheel endorsement.